Supergravity in twelve dimension

Supergravity in Five Dimensions

We study compactification of five dimensional ungauged N = 2 supergravity coupled to vectorand hypermultiplets on orbifold S/Z2. In the model, the vector multiplets scalar manifold is arbitrary while the hypermultiplet scalars span a generalized self dual Einstein manifold constructed by Calderbank and Pedersen. The bosonic and the fermionic sectors of the low energy effective N = 1 supergravit...

New Dimension in Drug Addiction Therapy

Brane Transmutation in Supergravity

We study a family of BPS solutions of type IIA supergravity that can be interpreted as describing the ‘transmutation’ of a Neveu-Schwarz five-brane into a D4-brane in the presence of a D6-brane. The D4-brane, which terminates on the D6-brane, can be equally well interpreted as a ‘pure multipole’ configuration of NS5-brane wrapped tightly around the D6-brane. Such a transmutation is a “near-core...

Black Holes in Supergravity

A brief review is given of the use of duality symmetries to form orbits of supergravity black-hole solutions and their relation to extremal (i.e. BPS) solutions at the limits of such orbits. An important technique in this analysis uses a timelike dimensional reduction and exchanges the stationary black-hole problem for a nonlinear sigma-model problem. Families of BPS solutions are characterized...

String Gyratons in Supergravity

In this paper we study solutions of supergravity equations generated by string-like sources moving with the speed of light. Study of solutions of the Einstein equations for objects moving with the velocity of light has long story. In 1934 Tolman [1] obtained solutions for the gravitational field of beams of light in the linear approximation. The exact solutions of the non-linear Einstein equati...